1071621 has 6 divisors (see below), whose sum is σ = 1547910. Its totient is φ = 714408.

The previous prime is 1071601. The next prime is 1071641. The reversal of 1071621 is 1261701.

It is an interprime number because it is at equal distance from previous prime (1071601) and next prime (1071641).

It can be written as a sum of positive squares in only one way, i.e., 756900 + 314721 = 870^2 + 561^2 .

It is not a de Polignac number, because 1071621 - 2⁵ = 1071589 is a prime.

It is a super-2 number, since 2×1071621² = 2296743135282, which contains 22 as substring.

It is a Curzon number.

1071621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1071594 and 1071603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59526 + ... + 59543.

It is an arithmetic number, because the mean of its divisors is an integer number (257985).

2^1071621 is an apocalyptic number.

It is an amenable number.

1071621 is a deficient number, since it is larger than the sum of its proper divisors (476289).

1071621 is a wasteful number, since it uses less digits than its factorization.

1071621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119075 (or 119072 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 1071621 is about 1035.1912866712. The cubic root of 1071621 is about 102.3325363838.

It can be divided in two parts, 107 and 1621, that added together give a cube (1728 = 12³).

The spelling of 1071621 in words is "one million, seventy-one thousand, six hundred twenty-one".